Green Poop ideas? Waiting on necropsy results. Chlamydiosis?

My birds have been hit hard and fast with something with mild respiratory symptoms. The first to break with it on Monday were the roo and lead hen. By the end of the day Monday it was obvious in the whole flock. By the next day the separate brooder coop was sneezing despite bio-security measures. And of course I have eggs due to hatch on the 1st that I am worried about The lead hen was necropsied on Wed and the roo left this under the roost last night. (see pic below) They are all currently on SMZ and Denagard proactively while we wait for results. Coccidia was detected in the preliminary fecal test. No worms. I assisted in the necropsy and we observed no abnormal organs and nothing of concern other than some mucus in the trachea and inflamed third eyelid in one eye. The vet is suspecting Chlamydiosis. One baby dropped dead in the brooder Thursday night after feeling feverish the day before. Other than occasionaly sneezing and some watery snot when head shaking - everyone acts normal, active, eating and drinking. Except my roo, who became depressed after the lead hen was necropsied. I know the poop could have to do with the fact that he has not wanted to eat, crow, drink or do anything since she died. But it is very green and watery/white. Anyone have any feedback/experience?

From what I have read about chlamydia infection in birds is that it commonly does not infect chickens. It is treated with chlortetracycline in the feed, but is more common in other species of birds. More commonly is mycoplasma or infectious bronchitis. The meds you are using treat mycpolasma and coryza, but since bronchitis is a virus, that would have to run it's course. Chicks exposed to IB will be carriers for up to a year, while MG or coryza can make carriers for life. Your symptoms don't sound like coryza, though. It's good that you have a vet involved.